A mega project is an extremely large-scale investment project. For the purpose of this repository, Mega projects are typically defined as costing more than MYR$1 billion and attracting a lot of public attention because of substantial impacts on communities, environment, and budgets.
Mega projects can also be defined as "initiatives that are physical, very expensive, and public." Care in the project development process may be needed to reduce any possible optimism bias and strategic misrepresentation.
Mega projects include bridges, tunnels, highways, railways, airports, seaports, power plants, dams, wastewater projects, Special Economic Zones, oil and natural gas extraction projects, public buildings, information technology systems, aerospace projects, and weapons systems.